COLLECTED IN CEYLON. 297 



Legion LOPHYROPODA. 



Order OSTRACODA. 

 Family Cypridid^. 

 Genus Ctpeis, Muller. 



Ctpeis Malcolmsoni, G. S. Brady. (Plate XXXVIII. figs. 

 5-7.) 



Cypris cylindrica, Baird, Proc. Zool. Soc. 1859, pi. 63. fig. 3. 



I have been enabled to compare the Ceylon specimens with 

 some from the Nagpur gathering, described by Dr. Baird, for 

 which specimens, as well as for some of the fossil O. cylindrica 

 collected by Dr. Malcolm son, I am indebted to my friend Professor 

 T. Eupert Jones. The two series are undoubtedly identical ; 

 but I learn from my brother, Mr. H. B. Brady, that those pre- 

 served in the British Museum are much larger, — probably Baird's 

 variety major *. 



The following brief description is drawn up from the Ceylon 

 specimens : — 



Shell elongated, subreniform, rather higher behind than in 

 front ; in lateral view the extremities are rounded, dorsum form- 

 ing a flattened arch, almost or quite straight in the middle ; 

 ventral margin slightly sinuated in front of the middle ; greatest 

 height equal to rather more than one third of the length : seen 

 from above, the outline is an extremely compressed oval, tapered 

 towards the front ; extremities subacuminate ; width equal to 

 more than one fourth of the length. Surface smooth and 

 polished, mottled green. Length -^^ of an inch (2"1 millim.). 

 The terminal claws, as well as the posterior portion of the 

 margin of the postabdominal rami, are beautifully pectinated 

 (Plate XXXYIII. fig. 5) ; in other respects I have not found that 

 the animal difi'ers from a normal Oypris. 



The shell has been well figured by Dr . Baird {loc. cit.). The 

 species would seem to be abundant both at Colombo and at Nag- 

 pur, from which last-named locality Dr . Baird's specimens came. 



* I cannot, however, follow Dr. Baird in identify ing the recent specimens 

 with Sowerby's C. cylindrica, which, though very similar in general character, 

 is smaller, higher in proportion to its length, cons iderably more tumid, and 

 more rounded in its lateral contour. 



